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Hranická propast, the Hranice abyss (Photo: Ji?í Komárek/CC BY-SA 4.0)
Krzysztof Starnawski, a diver from Poland, found the cave in 1999. Even back then, he knew it was an unusual cave: the water made the team’s skin itch. Carved from limestone, the cave was shaped by “hot water saturated with carbon dioxide [that] bubbled up like a volcano” from the cave bottom, reports National Geographic, which funded the expedition.read more

A cave in the Czech Republic has just been crowned the world's deepest underwater cave.
On Sept. 27, a Remotely Operated Underwater Vehicle (ROV) reached the bottom of Hranická Propast, at a depth of 1,325 feet. The team piloting th...

A Czech-Polish team said Friday it had discovered the world's deepest underwater cave in the eastern Czech Republic. At 404 metres (1,325 feet) deep, the Hranicka Propast, a limestone abyss near the city of Hranice, beats out Italy'...

Polish diver Krzysztof Starnawski may have discovered the deepest underwater cave yet: Hranická Propast in the eastern Czech Republic. Starnawski has been probing Hranická Propast since 1999, but only last year did he find a tiny pa...